topic Re: Why do all updates fail with some windows error? in Get your taxes done using TurboTax

Why do all updates fail with some windows error?

mayace — Mon, 23 Feb 2026 10:10:17 GMT

Microsoft installer error 1603. Fatal error during installation.

Re: Why do all updates fail with some windows error?

CassLO — Fri, 27 Jan 2023 17:23:07 GMT

To help resolve error 1603, please follow the instructions in the TurboTax FAQ below:

Error 1603: "A fatal error occurred during installation or updating"

Re: Why do all updates fail with some Windows 1603 error (Feb 2023) ?

PS56k — Sun, 19 Feb 2023 21:01:22 GMT

Installed and have been using TTax 2022 for the past month.... receiving updates as we go...

This weekend - Feb 18, 2023 - tried to perform the internal update and it failed... Windows 1603 -

Tried a few things, none worked - so just don't click on the "check for updates" anymore.

SO... WHAT HAPPENED ??

Noticed the "help" comments mentioning .NET issues....

So, it appeared that Windows Update installed a .NET update last week - Feb 14 -

and today is Feb 18, 2023 - wondering if the Windows update broke something inside TTax ?

https://support.microsoft.com/en-us/topic/february-14-2023-kb5022502-cumulative-update-for-net-framework-3-5-and-4-8-for-windows-10-version-20h2-windows-10-version-21h2-and-windows-10-version-22h2-4eed8a1d-297f-4c51-9263-bd7614cca9c7

Lastly - I am replying to this existing 1603 topic -

since I could not see how to create a NEW topic on the forum ????

Re: Why do all updates fail with some Windows 1603 error (Feb 2023) ?

SForrestLO — Mon, 20 Feb 2023 17:21:09 GMT

Please see this Turbo Tax help article for assistance with this error.

Error 1603: "A fatal error occurred during installation or updating"

Re: Why do all updates fail with some Windows 1603 error (Feb 2023) ?

PS56k — Wed, 22 Feb 2023 23:51:13 GMT

Now this is really BAD.....

Tried to TRANSMIT our taxes - CAN'T because TTax needs a final check for updates -

Tried to UPDATE - get the dreaded 1603 -

SO NOW WHAT - it was working just fine in January - and installed a few updates -
Here we are in February - and want to file - and CAN'T -

Installed the manual update - and then tried TTax again - nothing changed - still - 1603

https://ttlc.intuit.com/turbotax-support/en-us/help-article/update-products/manually-update-turbotax-windows-software-basic/L3Wf9OPaf_US_en_US?uid=legburgp

Re: Why do all updates fail with some Windows 1603 error (Feb 2023) ?

PS56k — Wed, 22 Feb 2023 23:55:52 GMT

Sorry - but none of these things work.....

https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/error-[product key removed]-occurred-installation/L0QVgZpOi_US_en_US?uid=legbziuh

As mentioned in another posting - everything was ok in January -
then Windows performed a .NET update -
and now TTax is broken - CAN'T UPDATE - and therefore CAN'T FILE -

Re: Why do all updates fail with some Windows 1603 error (Feb 2023) ?

PS56k — Thu, 23 Feb 2023 04:49:02 GMT

Browsing old 1603 errors and suggested solutions....

One was - to UN-install TTax and then RE-install TTax....

I might try that.... how much worse can it get -
After the install, you know the first thing is to run for Updates -

Re: Why do all updates fail with some Windows 1603 error (Feb 2023) ?

PS56k — Thu, 23 Feb 2023 21:57:18 GMT

WOW - just tried another Update - today is Thursday Feb 23, 2023 - AND IT WORKED -

- YAY - tried an update it WORKED ..... it was dated 2/22/23 -
and it must have been large as it took a long time with slow moving graph progress -
and of course, nothing changed on our end - no recent Windows Updates or any other changes.

The TTax update was large, as it looks like it totally replaced the entire software package with Windows 2/22/23 timestamps on the EXE and most of the DLL modules.